No? All Endurance does is increase your health pool. You want to mitigate as much damage as possible so your healers don't have to heal you as much. You don't generally need a 28k+ health pool, I know a Shadow tanking NiM EC with 25k or slightly less because they're using Power color crystals and high will power armorings.
yes i'd take less damage but i'd have less health. Doesn't that even out? I'm asking because my current build does get me through tfb hm with no trouble... I'm a bit surprised that i got my stats all wrong :/